This is the generated DOM:
<input class="form-control col-md-11 input ng-scope ng-animate ng-dirty ng-valid-required ng-invalid ng-invalid-minlength" type="password" value="" placeholder="*******" ng-model="user.confirmpassword" required="required" maxlength="80" autocomplete="off" ng-minlength="6" tooltip="Passwords do no match" tooltip-trigger="true" tooltip-placement="right" style="-webkit-transition-timing-function: initial, initial; transition-timing-function: initial, initial; -webkit-transition-delay: initial, initial; transition-delay: initial, initial;">
In the HTML:
<div class="col-md-9 text-left"><input class="form-control col-md-11 input" type="password" Value="" placeholder="*******" ng-model="user.confirmpassword" required="required" maxlength="80" autocomplete="off" ng-minlength="6" tooltip="Passwords do no match" tooltip-trigger="{{user.password !== user.confirmpassword}}" tooltip-placement="right"></div>
The tooltip-trigger is true but still no sign of tooltip. Anything, I am doing wrong?